So who convinced the 35-year-old pop singer? Carter tells Us that it was NSYNC's Joey Fatone -- who competed on seasons 4 and 15 of DWTS -- that talked him into hitting the dance floor.
"He talks about it all the time and I was really debating if I wanted to do it, and he said, 'It's a great experience, it keeps you in shape and it'll teach you a lot of stuff,'" Carter said of his boy band rival and friend. "He said, 'You'll get what you put into it.' And I'm a hard worker, so I think it'll be fun."
"My brother was on it; he did great; and he's a great little dancer and entertainer so I saw it through his eyes throughout that experience," he said of his baby bro. "And there's a lot of competitiveness in me and I think there's a little something inside of me that says, 'Okay, I'm going to go there and represent the Carter name and do even better than what he did!'"
While many fans of the show might think Carter has a leg up on the competition thanks to all the dancing he does with the Backstreet Boys, the singer admitted that he's still nervous.
"I never considered myself a great dancer. Even though funny enough I've danced my entire life, I might have had a little insecurity on that end," he said. "But I felt this time around I had some time and I think it'll be a cool experience. I think they can teach me some stuff."